SolarFM/plugins/youtube_download/yt_dlp/downloader/ism.py

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import binascii
import io
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import struct
import time
import urllib.error
from .fragment import FragmentFD
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from ..utils import RetryManager
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u8 = struct.Struct('>B')
u88 = struct.Struct('>Bx')
u16 = struct.Struct('>H')
u1616 = struct.Struct('>Hxx')
u32 = struct.Struct('>I')
u64 = struct.Struct('>Q')
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s88 = struct.Struct('>bx')
s16 = struct.Struct('>h')
s1616 = struct.Struct('>hxx')
s32 = struct.Struct('>i')
unity_matrix = (s32.pack(0x10000) + s32.pack(0) * 3) * 2 + s32.pack(0x40000000)
TRACK_ENABLED = 0x1
TRACK_IN_MOVIE = 0x2
TRACK_IN_PREVIEW = 0x4
SELF_CONTAINED = 0x1
def box(box_type, payload):
return u32.pack(8 + len(payload)) + box_type + payload
def full_box(box_type, version, flags, payload):
return box(box_type, u8.pack(version) + u32.pack(flags)[1:] + payload)
def write_piff_header(stream, params):
track_id = params['track_id']
fourcc = params['fourcc']
duration = params['duration']
timescale = params.get('timescale', 10000000)
language = params.get('language', 'und')
height = params.get('height', 0)
width = params.get('width', 0)
stream_type = params['stream_type']
creation_time = modification_time = int(time.time())
ftyp_payload = b'isml' # major brand
ftyp_payload += u32.pack(1) # minor version
ftyp_payload += b'piff' + b'iso2' # compatible brands
stream.write(box(b'ftyp', ftyp_payload)) # File Type Box
mvhd_payload = u64.pack(creation_time)
mvhd_payload += u64.pack(modification_time)
mvhd_payload += u32.pack(timescale)
mvhd_payload += u64.pack(duration)
mvhd_payload += s1616.pack(1) # rate
mvhd_payload += s88.pack(1) # volume
mvhd_payload += u16.pack(0) # reserved
mvhd_payload += u32.pack(0) * 2 # reserved
mvhd_payload += unity_matrix
mvhd_payload += u32.pack(0) * 6 # pre defined
mvhd_payload += u32.pack(0xffffffff) # next track id
moov_payload = full_box(b'mvhd', 1, 0, mvhd_payload) # Movie Header Box
tkhd_payload = u64.pack(creation_time)
tkhd_payload += u64.pack(modification_time)
tkhd_payload += u32.pack(track_id) # track id
tkhd_payload += u32.pack(0) # reserved
tkhd_payload += u64.pack(duration)
tkhd_payload += u32.pack(0) * 2 # reserved
tkhd_payload += s16.pack(0) # layer
tkhd_payload += s16.pack(0) # alternate group
tkhd_payload += s88.pack(1 if stream_type == 'audio' else 0) # volume
tkhd_payload += u16.pack(0) # reserved
tkhd_payload += unity_matrix
tkhd_payload += u1616.pack(width)
tkhd_payload += u1616.pack(height)
trak_payload = full_box(b'tkhd', 1, TRACK_ENABLED | TRACK_IN_MOVIE | TRACK_IN_PREVIEW, tkhd_payload) # Track Header Box
mdhd_payload = u64.pack(creation_time)
mdhd_payload += u64.pack(modification_time)
mdhd_payload += u32.pack(timescale)
mdhd_payload += u64.pack(duration)
mdhd_payload += u16.pack(((ord(language[0]) - 0x60) << 10) | ((ord(language[1]) - 0x60) << 5) | (ord(language[2]) - 0x60))
mdhd_payload += u16.pack(0) # pre defined
mdia_payload = full_box(b'mdhd', 1, 0, mdhd_payload) # Media Header Box
hdlr_payload = u32.pack(0) # pre defined
if stream_type == 'audio': # handler type
hdlr_payload += b'soun'
hdlr_payload += u32.pack(0) * 3 # reserved
hdlr_payload += b'SoundHandler\0' # name
elif stream_type == 'video':
hdlr_payload += b'vide'
hdlr_payload += u32.pack(0) * 3 # reserved
hdlr_payload += b'VideoHandler\0' # name
elif stream_type == 'text':
hdlr_payload += b'subt'
hdlr_payload += u32.pack(0) * 3 # reserved
hdlr_payload += b'SubtitleHandler\0' # name
else:
assert False
mdia_payload += full_box(b'hdlr', 0, 0, hdlr_payload) # Handler Reference Box
if stream_type == 'audio':
smhd_payload = s88.pack(0) # balance
smhd_payload += u16.pack(0) # reserved
media_header_box = full_box(b'smhd', 0, 0, smhd_payload) # Sound Media Header
elif stream_type == 'video':
vmhd_payload = u16.pack(0) # graphics mode
vmhd_payload += u16.pack(0) * 3 # opcolor
media_header_box = full_box(b'vmhd', 0, 1, vmhd_payload) # Video Media Header
elif stream_type == 'text':
media_header_box = full_box(b'sthd', 0, 0, b'') # Subtitle Media Header
else:
assert False
minf_payload = media_header_box
dref_payload = u32.pack(1) # entry count
dref_payload += full_box(b'url ', 0, SELF_CONTAINED, b'') # Data Entry URL Box
dinf_payload = full_box(b'dref', 0, 0, dref_payload) # Data Reference Box
minf_payload += box(b'dinf', dinf_payload) # Data Information Box
stsd_payload = u32.pack(1) # entry count
sample_entry_payload = u8.pack(0) * 6 # reserved
sample_entry_payload += u16.pack(1) # data reference index
if stream_type == 'audio':
sample_entry_payload += u32.pack(0) * 2 # reserved
sample_entry_payload += u16.pack(params.get('channels', 2))
sample_entry_payload += u16.pack(params.get('bits_per_sample', 16))
sample_entry_payload += u16.pack(0) # pre defined
sample_entry_payload += u16.pack(0) # reserved
sample_entry_payload += u1616.pack(params['sampling_rate'])
if fourcc == 'AACL':
sample_entry_box = box(b'mp4a', sample_entry_payload)
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if fourcc == 'EC-3':
sample_entry_box = box(b'ec-3', sample_entry_payload)
elif stream_type == 'video':
sample_entry_payload += u16.pack(0) # pre defined
sample_entry_payload += u16.pack(0) # reserved
sample_entry_payload += u32.pack(0) * 3 # pre defined
sample_entry_payload += u16.pack(width)
sample_entry_payload += u16.pack(height)
sample_entry_payload += u1616.pack(0x48) # horiz resolution 72 dpi
sample_entry_payload += u1616.pack(0x48) # vert resolution 72 dpi
sample_entry_payload += u32.pack(0) # reserved
sample_entry_payload += u16.pack(1) # frame count
sample_entry_payload += u8.pack(0) * 32 # compressor name
sample_entry_payload += u16.pack(0x18) # depth
sample_entry_payload += s16.pack(-1) # pre defined
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codec_private_data = binascii.unhexlify(params['codec_private_data'].encode())
if fourcc in ('H264', 'AVC1'):
sps, pps = codec_private_data.split(u32.pack(1))[1:]
avcc_payload = u8.pack(1) # configuration version
avcc_payload += sps[1:4] # avc profile indication + profile compatibility + avc level indication
avcc_payload += u8.pack(0xfc | (params.get('nal_unit_length_field', 4) - 1)) # complete representation (1) + reserved (11111) + length size minus one
avcc_payload += u8.pack(1) # reserved (0) + number of sps (0000001)
avcc_payload += u16.pack(len(sps))
avcc_payload += sps
avcc_payload += u8.pack(1) # number of pps
avcc_payload += u16.pack(len(pps))
avcc_payload += pps
sample_entry_payload += box(b'avcC', avcc_payload) # AVC Decoder Configuration Record
sample_entry_box = box(b'avc1', sample_entry_payload) # AVC Simple Entry
else:
assert False
elif stream_type == 'text':
if fourcc == 'TTML':
sample_entry_payload += b'http://www.w3.org/ns/ttml\0' # namespace
sample_entry_payload += b'\0' # schema location
sample_entry_payload += b'\0' # auxilary mime types(??)
sample_entry_box = box(b'stpp', sample_entry_payload)
else:
assert False
else:
assert False
stsd_payload += sample_entry_box
stbl_payload = full_box(b'stsd', 0, 0, stsd_payload) # Sample Description Box
stts_payload = u32.pack(0) # entry count
stbl_payload += full_box(b'stts', 0, 0, stts_payload) # Decoding Time to Sample Box
stsc_payload = u32.pack(0) # entry count
stbl_payload += full_box(b'stsc', 0, 0, stsc_payload) # Sample To Chunk Box
stco_payload = u32.pack(0) # entry count
stbl_payload += full_box(b'stco', 0, 0, stco_payload) # Chunk Offset Box
minf_payload += box(b'stbl', stbl_payload) # Sample Table Box
mdia_payload += box(b'minf', minf_payload) # Media Information Box
trak_payload += box(b'mdia', mdia_payload) # Media Box
moov_payload += box(b'trak', trak_payload) # Track Box
mehd_payload = u64.pack(duration)
mvex_payload = full_box(b'mehd', 1, 0, mehd_payload) # Movie Extends Header Box
trex_payload = u32.pack(track_id) # track id
trex_payload += u32.pack(1) # default sample description index
trex_payload += u32.pack(0) # default sample duration
trex_payload += u32.pack(0) # default sample size
trex_payload += u32.pack(0) # default sample flags
mvex_payload += full_box(b'trex', 0, 0, trex_payload) # Track Extends Box
moov_payload += box(b'mvex', mvex_payload) # Movie Extends Box
stream.write(box(b'moov', moov_payload)) # Movie Box
def extract_box_data(data, box_sequence):
data_reader = io.BytesIO(data)
while True:
box_size = u32.unpack(data_reader.read(4))[0]
box_type = data_reader.read(4)
if box_type == box_sequence[0]:
box_data = data_reader.read(box_size - 8)
if len(box_sequence) == 1:
return box_data
return extract_box_data(box_data, box_sequence[1:])
data_reader.seek(box_size - 8, 1)
class IsmFD(FragmentFD):
"""
Download segments in a ISM manifest
"""
def real_download(self, filename, info_dict):
segments = info_dict['fragments'][:1] if self.params.get(
'test', False) else info_dict['fragments']
ctx = {
'filename': filename,
'total_frags': len(segments),
}
self._prepare_and_start_frag_download(ctx, info_dict)
extra_state = ctx.setdefault('extra_state', {
'ism_track_written': False,
})
skip_unavailable_fragments = self.params.get('skip_unavailable_fragments', True)
frag_index = 0
for i, segment in enumerate(segments):
frag_index += 1
if frag_index <= ctx['fragment_index']:
continue
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retry_manager = RetryManager(self.params.get('fragment_retries'), self.report_retry,
frag_index=frag_index, fatal=not skip_unavailable_fragments)
for retry in retry_manager:
try:
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success = self._download_fragment(ctx, segment['url'], info_dict)
if not success:
return False
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frag_content = self._read_fragment(ctx)
if not extra_state['ism_track_written']:
tfhd_data = extract_box_data(frag_content, [b'moof', b'traf', b'tfhd'])
info_dict['_download_params']['track_id'] = u32.unpack(tfhd_data[4:8])[0]
write_piff_header(ctx['dest_stream'], info_dict['_download_params'])
extra_state['ism_track_written'] = True
self._append_fragment(ctx, frag_content)
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except urllib.error.HTTPError as err:
retry.error = err
continue
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if retry_manager.error:
if not skip_unavailable_fragments:
return False
self.report_skip_fragment(frag_index)
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return self._finish_frag_download(ctx, info_dict)